test: Avoid public escape slash SPEF conflict

Keep the existing escape_slash SPEF goldens aligned with the current public master versions and move the reduced regression comparisons to dot-suffixed SPEF goldens that are included by the existing Bazel resource glob.

This avoids the public PR conflict from the est parasitic golden update while preserving the reduced escape slash regression behavior and keeping the private-to-public sync path intact.

Tested: RESULTS_DIR=/workspace/exp/escape_slash_conflict/verify_flat2 openroad -no_init -no_splash -exit -metrics /workspace/exp/escape_slash_conflict/escape_slash2.metrics.json escape_slash.tcl

Tested: RESULTS_DIR=/workspace/exp/escape_slash_conflict/verify_hier2 openroad -no_init -no_splash -exit -metrics /workspace/exp/escape_slash_conflict/escape_slash_hier2.metrics.json escape_slash_hier.tcl

Tested: bazel test //src/dbSta/test:escape_slash-tcl_test //src/dbSta/test:escape_slash_hier-tcl_test

Tested: git diff --check

Co-authored-by: OmX <omx@oh-my-codex.dev>
Signed-off-by: Jaehyun Kim <jhkim@precisioninno.com>

Author: jhkim-pii

src/dbSta/test/escape_slash.reduced.spefok

@@ -0,0 +1,54 @@
+*SPEF "ieee 1481-1999"
+*DESIGN "multi_sink"
+*DATE "11:11:11 Fri 11 11, 1111"
+*VENDOR "The OpenROAD Project"
+*PROGRAM "OpenROAD"
+*VERSION "1.0"
+*DESIGN_FLOW "NAME_SCOPE LOCAL" "PIN_CAP NONE"
+*DIVIDER /
+*DELIMITER :
+*BUS_DELIMITER []
+*T_UNIT 1 NS
+*C_UNIT 1 FF
+*R_UNIT 1 KOHM
+*L_UNIT 1 HENRY
+
+*PORTS
+clk I
+
+*D_NET clk 0.213642
+*CONN
+*P clk I
+*I hi_inst\/gclk2_inst:CK I *D CLKGATE_X1
+*CAP
+1 clk:0 0.106821
+2 clk:1 0.106821
+*RES
+1 clk:0 clk:0 1e-06
+2 clk clk:0 1e-06
+3 clk:1 clk:0 0.0101591
+4 hi_inst\/gclk2_inst:CK clk:2 1e-06
+5 clk:2 clk:1 1e-06
+*END
+
+*D_NET hi_gclk2 0.430855
+*CONN
+*I ff0\/name:CK I *D DFF_X1
+*I h1\/ff1:CK I *D DFF_X1
+*I hi_inst\/gclk2_inst:GCK O *D CLKGATE_X1
+*CAP
+1 hi_gclk2:0 0.0797636
+2 hi_gclk2:1 0.215427
+3 hi_gclk2:2 0.135664
+*RES
+1 hi_gclk2:0 hi_gclk2:0 1e-06
+2 hi_inst\/gclk2_inst:GCK hi_gclk2:3 1e-06
+3 hi_gclk2:3 hi_gclk2:0 1e-06
+4 hi_gclk2:1 hi_gclk2:0 0.00758582
+5 h1\/ff1:CK hi_gclk2:5 1e-06
+6 hi_gclk2:5 hi_gclk2:1 1e-06
+7 hi_gclk2:2 hi_gclk2:1 0.0129021
+8 ff0\/name:CK hi_gclk2:7 1e-06
+9 hi_gclk2:7 hi_gclk2:2 1e-06
+*END
+